The number of boys in a class is three times the number of girls Which one of the following numbers ...........

Logical Reasoning(Master ) Arithmetical Reasoning

The number of boys in a class is three times the number of girls. Which one of the following numbers cannot represent the total number of children in the class?

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Explanation:

Let number of girls = x and number of boys = 3x.
Then, 3x + x = 4x = total number of students.
Thus, to find exact value of x,
The total number of students must be divisible by 4.